Want to get rid of the plastic oil cap on your BMW S58 powered vehicles including the G8X M3/4, and the X3/4M SUVs, and add some nice billet pop to your engine bay? Look no further than the VTT S58 Billet Oil cap. These are a true Billet oil cap machined from 6061-T6, and anodized in a variety of colors. These are NOT a thin cap that snaps over your existing oil cap. Currently, we offer them in 3 colors, but a custom anodize is available on request for an extra $75, custom takes about 2-4 weeks.